Thomas lewis



4Vevident that it may be applied to advantage wherever loose valves areemployed.

@uiten tetra @anni iffitr.

THO MAS LEWIS, OF MAVLDEN, M ASSACHUSTTS.`

Letters Paten-t No. 68,629, dated September 10,1867,`

IMPROVEMENT IN sYnINens.

itin tlptnlt nient tu in lips: rlttts tant mit making intl ai tlc 5mn;

TO ALL WHOM IT MAY CONCERN:

Bc it' known that I, THOMAS LEWIS, of Malden, in the county ofMiddlesex, and State of Massachusetts, i l have invented an Improvementin Enema Syringes, of whichthe following is a full, clear, and exactdescription, l reference being had to the accompanying drawings, makingpart of this specification, in which-4 Figure 1 is a section through thecentre of a syringe having my improvement applied thereto. Figure 2 isan elevation (enlarged) of the end of the inlet tube which contains thcvalve. 1 Figure 3 is a detail, (enlargeth) to be referred to. p i Myinvention relates particularly to that class of enema syringes providedwith an elastic bulb, operating` in connection with valves placed withinthe metallic connectionsof thesyringe. vThese `valves frequentlydrop outand are lost when the connections are unscrewed for the purpose ofcleansing the parts or packing in: thc j ,l box, to avoid which thevalves have sometimes been enclosed in separate chambers. To form thesechambers, l l however, it becomes necessary to have two screw joints ineach connection, which renders the syringe .compli` i cated andexpensive. i l v ,l l l i j l My invention has for its object toovercomethese diliiculties, and consists in retaining the valve in placeand preventing it from dropping out by means of a perforated plate ordisk, which is screwed down into the l connection over the valve, theliquid passing freely through it as required. l v V i Toenable othersskilled-,in the art to understand and use my invention, I willproceed todescribe the manner in which I have carried it out. v

In the said drawings, A represents the -clastic bulb ofthe syringe, Bthe induction pipe, and O thc metallic connection between the two. Theupper end of the pipe B is enlarged, forming a chamber, which containsthe induction valve a, a female screw, b, bein`g formed within thechamber, by means of which the pipe' is secured to the connection C, and'may be removed at pleasure. c is a perforated disk or plate, of metalor other suitable material, which is made to tit the screw b, and whenin place, as seen in figs. 1 und 2, serves to confine the valve i a inits place, and prevent it frein dropping out and being lost on the pipeB being unscrewed and removedfrom thc syringe, and it will be seen thatthe perforations'in thefdisk c allow the liquid to pass freely throughit, as required. The disk e may be readily turned to screw it down intopla-ce, or remove it when itis desired to take out the valve, byinserting thcsquarc end Yof a piece of wood or other article which maybeat handinto the rec`` tangular opening d. i l f v By means of thisarrangement all liability of losing the valve is avoided, while the costof the disk c is very p triliing, and but one screw joint is renderednecessary in each connection. A similar`- disk c may be placed in j thebranch D, over the cducton valve e, if desired, although I do not deemit of` as much importance, as the] f connection at this point is notoften unserewed, .while the induction pipe B is removed each time thesyringe` is` placed in its box. By the use of the disk c I am enabled tomake a syringe with a long metallic inlet pipe, B, i as portable asthose syringes which are furnished with two elastic tubes, as the pipe Bmay be made removable, and when unscrewed, so that it can be placed inthe box,the valve is held securely in place without danger being lost. Ido not confine myself to the use of the disk c in the particular varietyofvsyringe shown, as it I am aware of the nature of thepatents issued toH. Lockwood, August 25,1863, and to Morris Mattson, February, 1867, anddo not claim their mode of construction, but what'I chp'fuias my`invention, anddesire 1 to secure by Letters Patent, is i The removableperforated disk c, with the male screw-thread on its outer edge adjustedtoiitthcfemalev screw-thread b, substantially as described and for thepurpose set forth.l A

' THOMAS LEWIS. i

Witnesses: i

P. E; Tnscnunacnun, N. W. SIEAItNs.

